Enhancement of dirvar score

Now the collect interval is incremented at each dirvar update

gte/world.py

@@ -203,9 +203,12 @@ class LivingTurmit(Turmit):
         self._absx = self._absy = 0
         self._prev_abs = (0, 0)
         self._dirvar = 0
+        self._dirsum = (0,0)
         self._prev_dirvar = None
         self._dirvar_res = 64
-        self._steps = 1
+        self._dirvar_res_inc = 1
+        self._steps = 5
+        self._dirvar_cnt = self._dirvar_res
         
 
     def __call__(self):
@@ -218,16 +221,21 @@ class LivingTurmit(Turmit):
         self.move(tdir)
 
         # direction variation handling
-        if self._steps % self._dirvar_res == 0:
+        #if self._steps % self._dirvar_res == 0:
+        if self._dirvar_cnt <= 0:
             dy = self._absy - self._prev_abs[0]
             dx = self._absx - self._prev_abs[1]
             self._prev_abs = (self._absy, self._absx)
             if self._prev_dirvar is not None:
                 pdvar = self._prev_dirvar
-                self._dirvar += abs(pdvar[0] - dy) + abs(pdvar[1] - dx)
+                var = abs(pdvar[0] - dy), abs(pdvar[1] - dx)
+                var = [ v if v > 1 else 0 for v in var ]
+                self._dirvar += sum(var)
             self._prev_dirvar = (dy, dx)
-            self._dirvar_res += 1
-            
+            self._dirvar_cnt = self._dirvar_res
+            self._dirvar_res += self._dirvar_res_inc
+        
+        self._dirvar_cnt -= 1
         self._steps += 1
 
     def dirvar(self):